Bullseye is still regarded as one of the most accurate fast powders available by the competitive precision pistol crowd. Titegroup, Clays, and HP-38/WW-231 are all pretty close in popularity for the .45 ACP. Which one you use usually comes down to which one you can get locally.

Some people just don't care how dirty or clean a powder is.

I like 4.0 gr of BE under a 230 LRN. Or 4.3-4.5 for the Berry's HBRN (not that I'd bother with that bullet again--good, but nothing special). Unlike 700-X, it cycles everything at light loads, and meters much better.